Comparison : Item # 04019-04, 6401SXH X-Hvy Short Forged Flare Nut
Item # 04019-06, 6401SXH X-Hvy Short Forged Flare Nut
Item # 04019-08, 6401SXH X-Hvy Short Forged Flare Nut
Item # 04019-10, 6401SXH X-Hvy Short Forged Flare Nut